Organic boron-sulfur compounds and lubricant compositions containing same

Abstract

Sulfur containing diols are reacted with hydroxy boron compounds resulting in the formation of symmetrically balanced compounds which are useful as additives for lubricating oil compositions.

What is claimed is: 
     
       1. The compound resulting from the reaction of a sulfur-containing diol compound having the structural formula   HO--X--OH     where X is a symmetrical group of atoms containing carbon and sulfur atoms, and the sulfur component of X is located at the mid point of the symmetrical chain if X is a lone sulfur atom or, if X contains more than one sulfur atom those sulfur atoms are located at equidistant points from the center of the group, with 10-hydroxy-10,9-boroxarophenanthrene.   
     
     
       2. The compound of claim 1 wherein the sulfur containing diol is 2,2'-thiodiethanol. 
     
     
       3. The compound of claim 1 wherein the sulfur containing diol compound is 3,6-dithia-1,8-octane diol. 
     
     
       4. The compound of claim 1 wherein the sulfur-containing diol is 3,3'-thiodipropanol. 
     
     
       5. The compound of claim 1 wherein the sulfur-containing diol is 1,4-dithiane-2,5,-diol. 
     
     
       6. The compound comprising ##STR8## where R 1  and R 2  are hydrocarbon radicals which are or are not linked into a cyclic configuration, X is a symmetrical group of atoms containing sulfur and carbon atoms, and the sulfur component of X is located at the mid point of the symmetrical chain if X is a lone sulfur atom or, if X contains more than one sulfur atom those sulfur atoms are located at equidistant points from the center of the group. 
     
     
       7. The compound of claim 6 wherein the two ##STR9## radicals are mirror images of each other. 
     
     
       8. The compound ##STR10## 
     
     
       9. The compound ##STR11## 
     
     
       10. A lubricating composition comprising a liquid hydrocarbon lubricant and between about 0.1 and about 1.0% by weight of the total lubricant composition of the compound of claim 1. 
     
     
       11. A lubricating composition comprising a liquid hydrocarbon lubricant and between about 0.01 and about 1.0% by weight of the total lubricant composition of the compound of claim 2. 
     
     
       12. A lubricating composition comprising a liquid hydrocarbon lubricant and between about 0.01 and about 1.0% by weight of the total lubricant composition of the compound of claim 3. 
     
     
       13. A lubricating composition comprising a liquid hydrocarbon lubricant and between about 0.01 and about 1.0% by weight of the total lubricant composition of the compound of claim 4. 
     
     
       14. A lubricating composition comprising a liquid hydrocarbon lubricant and between about 0.01 and about 1.0% by weight of the total lubricant composition of the compound of claim 5. 
     
     
       15. A lubricating composition comprising a liquid hydrocarbon lubricant and between about 0.01 and about 1.0% by weight of the total lubricant composition of the compound of claim 6. 
     
     
       16. A lubricating composition comprising a liquid hydrocarbon lubricant and between about 0.01 and about 1.0% by weight of the total lubricant composition of the compound of claim 7. 
     
     
       17. A lubricating composition comprising a liquid hydrocarbon lubricant and between about 0.01 and about 1.0% by weight of the total lubricant composition of the compound of claim 8. 
     
     
       18. A lubricating composition comprising a liquid hydrocarbon lubricant and between about 0.01 and about 1.0% by weight of the total lubricant composition of the compound of claim 9. 
     
     
       19. The lubricating composition of claim 10 wherein the hydrocarbon lubricant selected from the group consisting of mineral oil, synthetic oil. 
     
     
       20. A method for increasing the hardness of a steel surface comprising lubricating said surface with a lubricating composition comprising: a. a lubricating oil, and;   b. a boron- and sulfur-containing additive comprising the composition prepared by reacting 10-hydroxy-10,9-boroxarophenanthrene with a sulfur-containing diol compound of the formula:   HO--X--OH        where x is a symmetrical group of atoms containing carbon and sulfur atoms, and the sulfur component of X is located at the mid point of the symmetrical chain if X is a lone sulfur atom or, if X contains more than one sulfur atom those sulfur atoms are located at equidistant points from the center of the group.   
     
     
       21. The method of claim 20 wherein said sulfur-containing diol is 2,2'-thiodiethanol. 
     
     
       22. The method of claim 20 wherein said sulfur-containing diol is 3,6-dithia-1,8-octane diol. 
     
     
       23. The method of claim 20 wherein said sulfur-containing diol is 3,3'-thiodipropanol. 
     
     
       24. The method of claim 20 wherein said sulfur-containing diol is 1,4-dithiane-2,5,-diol. 
     
     
       25. The method of claim 20 wherein said boron- and sulfur-containing additive for increasing hardness is the compound, ##STR12## 
     
     
       26. The method of claim 20 wherein said boron- and sulfur-containing additive for increasing hardness is the compound, ##STR13## 
     
     
       27. A process for preparing the reaction product of a sulfur-containing diol compound with a hydroxy boron compound comprising reacting a phenanthrene selected from the group consisting of 10-hydroxy-10, 9-boroxarophenanthrene, and ring substituted phenanthrenes containing methyl, methoxy, nitro, chlorine or bromine substituents with a sulfur-containing diol compound selected from the group consisting of 2,2'-thiodiethanol, 3,3'-thiodipropanol, 3,6-dithia-1,8-octanediol and 1,4-dithiane-2,5-diol. 
     
     
       28. The method of claim 20 wherein said boron- and sulfur-containing additive for increasing hardness is the compound of the structural formula: ##STR14## where R 1  and R 2  are hydrocarbon radicals which are or are not linked into a cyclic configuration, X is a symmetrical group of atoms containing sulfur and carbon atoms, and the sulfur component of X is located at the mid point of the symmetrical chain if X is a lone sulfur atom or, if X contains more than one sulfur atom those sulfur atoms are located at equidistant points from the center of the group.